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fomenos
2 years ago
9

Which of the following best describes rust?

Biology
1 answer:
olga nikolaevna [1]2 years ago
3 0

Answer:

irreversible chemical change

Explanation:

A chemical change always results in a new substance and as it is not possible to reverse it, it is an irreversible chemical change.

I hope you understood :)

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How do spores survive even after the plant has died?
Soloha48 [4]

Answer:

spores have special chemicals that prevent ot from

5 0
2 years ago
Compare and contrast the evidence that supports the two hypotheses describing how long, complex molecules that carry information
Rudiy27

Oparin and Haldane's theory and Miller's experiment are the proof that long complex molecules that carry information such as DNA, might have formed on early earth.

Explanation:

Oparin and Haldane Hypothesis states that life on Early earth could have evolved by chemical evolution.

Oparin and Haldane said that the reducing atmosphere of the early earth caused simple inorganic molecules to react by using sunlight and formed molecules like amino acids and nucleotides.

These monomers combined to form polymers, they would have attained self-replicating tendency eventually these would have assembled into structures and these macromolecules had also made membrane-bound organelle.

Although this hypothesis is not fully accepted but part of it which talks about formation of molecules is accepted.

Millers and Urey in their experiment created an artificial reducing environment like that of early earth. They used a heated pool of water, atmospheric gases like H2O,CH4,N2, NH4 and sparks of electricity. After running the experiment for some days they found that amino acids, sugars, lipids and other organic molecules had formed.

Their hypothesis is not fully accepted but part of is evident that organic building block is formed from inorganic constituent on the earth.

8 0
2 years ago
Why does geographic isolation cause speciation?
zimovet [89]

Answer:

A. It allows two populations to evolve separately.

Explanation:

Geographic isolation is theorized to have catalyzed the formation of new species. Let’s say groups A and B of a bird species get separated by something, and they can’t cross between to interbreed or exchange alleles.

We describe this as no gene flow, which is the opposite of choices C and D. Because of this, they may diverge if given enough time due to the difference in environmental pressures, because they’re now in different environments.

B is incorrect because it doesn’t apply.

3 0
3 years ago
Read 2 more answers
Where are the meristems, vascular tissue, mesophyll, and carpel found in.
fredd [130]
Mesophyll is a partí al reaction
6 0
3 years ago
What occurs when pathogens are transferred from one surface to another?
densk [106]
Cross contamination means the transfer of pathogens from surface to another
3 0
3 years ago
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